Shut off the water that supplies the PVC plumbing you intend to remove.
Place a drip pan or bucket under the PVC pipes to catch the trapped water in the pipes.
Cut PVC pipes with a hacksaw or pipe cutters. The hacksaw works better for larger PVC pipes commonly used for drains and exhaust pipes, while pipe cutters are sufficient for cutting lines measuring 1 inch or less in diameter.
Use a utility knife or emery cloth to remove burrs made by the hacksaw.
Throw discarded PVC pipes and fittings in the trash or call your local environmental protection agency to see where you can donate the PVC. Some companies can grind the PVC and recycle it into other plastic products.